Pick the diagram that is most like the scenario you are in and see if you can wire your switch. If you are trying to troubleshoot a 3 way switch operation you will need to identify the function of each wire.
The white wire of the cable going to the switch is attached to the black line in the fixture box using a wire nut.
Three way wiring diagram. With these diagrams below it will take the guess work out of wiring. So what you should see if you have correct 3 wire electrical cable romex is a black power white neutral and now a 3rd red wire. This might seem intimidating but it does not have to be.
The two hot wires of three wire cable connect to a pair of brass colored traveler terminals on each switch. Wiring diagrams for 3 way switches. Three wire cable runs between the switches and 2 wire cable runs to the light.
Typical 3 way switch wiring nm cable. This is the 3 wire cable which you must have to wire a 3 way. Make a small donation 1 5 to keep it running.
A 3 wire nm connects the traveler terminals of the first and second 3 way switch together. In this diagram the incoming hot wire attaches to the first switch s common dark colored terminal. A three way switch is built and wired a little differently than a conventional single pole light switch.
Regardless of what 3 way switch wiring diagram you re following you ll need to use a 3 wire cable to connect the two 3 way light switches. Installing a 3 way switch with wiring diagrams three way switches control lights and receptacles from two points. Was this page helpful.
In my mind wiring is one thing but to look at a diagram as the one above and understand the principle involved that is the key to do it yourself house wiring. These diagrams illustrate how to wire a pair of three way light switches in three different situations. 3 way switch diagram 2 above shows the electricity source starting at the fixture.
The black and red wires between sw1 and sw2 are connected to the traveler terminals. In the 1st diagram below a 2 wire nm cable supplies power from the panel to the first switch box. For example a light in a hallway that can be operated from the first floor and second floor install a three way switch.
Wiring diagram 3 way switch with light at the end. In this diagram the electrical source is at the first switch and the light is located at the end of the circuit. 3 way switch wiring diagram.
Take a closer look at a 3 way switch wiring diagram. This 3 way switch wiring diagram shows how to wire the switches and the light when the power is coming to the light switch. Three way light switches control a light from two locations such as from both ends of a staircase or hallway.
If you re simply replacing a 3 way switch the diagrams below will show the different scenarios on how your circuit could possibly be wired. Diagram 1 above shows the electricity source starting at the left 3 way switch. On wiring a 3 way circuit.
Wires consisting of a line a load a neutral a pair of travelers and two 3 way switches. The black line wire connects to the common terminal of the first 3 way switch. Traveler wires are interchangeable.
All three way switch and 2 way switch wiring diagrams have the same basic components.